Door locking apparatus

Abstract

A door locking apparatus according to an embodiment of the present invention is characterized in that: a square rod (20) is installed on a door leaf (10) so as to be able to reciprocate in the axial direction, and a spring (17) is installed on the square rod (20) so that an outward elastic force is constantly applied to the square rod (20); an arc-shaped plate (23) and a retaining plate (25) are formed at the end of the square rod (20), the arc-shaped plate (23) has an arc-shaped curved surface, the retaining plate (25) is perpendicular to the arc-shaped plate (23), and the arc-shaped plate (23) is symmetrical about the retaining plate (25); and a recess (33) having a shape matching the arc-shaped plate (23) and the retaining plate (25) is formed outside the door leaf (10), and the door leaf (10) is fixed by inserting the arc-shaped plate (23) and the retaining plate (25) of the square rod (20) into the recess (33). The door locking apparatus according to an embodiment of the present invention is characterized in that the door leaf (10) can rotate freely, even without an unlocking operation by a user, when the door leaf (10) is in an open state. Once the square rod (20) constituting the locking apparatus is coupled to the recess (33), the retaining plate (25) suppresses disengagement of the square rod (20) from the recess (33), and thus the locked state of the door leaf (10) can be stably maintained.

Description

Door fixing device

[0001] The present invention relates to a door fixing device for fixing doors, such as fire doors.

[0002] It is common for doors, such as fire doors, to be equipped with a bolt-type locking device to fix the open or closed state of the door leaf.

[0003] [Prior Art Literature]

[0004] [Patent Literature]

[0005] (Patent Document 1) KR 10-1231453 B1

[0006] Conventional door fixing devices, including Patent Document 1, are equipped with a rod that reciprocates outwardly from the lower, upper, or side end of the door, and an insertion part into which the rod is inserted is formed in the floor, ceiling, or side door frame of the building at the door installation point, so that when the rod is inserted into the insertion part, the door is fixed, and when the rod is pulled out from the insertion part, the door is released from fixation, allowing for free rotational opening and closing.

[0007] In other words, since manually reciprocating the rod in the axial direction is absolutely necessary to set the rotational or fixed state of the door, it is structurally impossible to operate in a manner where free rotation is possible without manipulating the rod when the door is open, but the rod automatically extends to lock the door without separate operation once the rotating door reaches the fixed position.

[0008] Accordingly, a method could be considered in which an arc-shaped curved surface is formed at the end of the rod and an elastic element is installed between the rod and the door body to ensure that a constant elastic force acts to protrude the rod outward; however, in this case, the curved surface of the rod slides over the outer edge of the insertion part in the direction in which the curve is formed, causing the rod to easily detach from the insertion part.

[0009] Therefore, in the case of doors where a curved rod is applied as a locking device, there was a problem in that a door frame with a ledge formed to suppress unnecessary rotation of the door had to be applied.

[0010] In particular, as doors without outer frames are frequently used recently for both mobility convenience and interior aesthetics, there is an urgent need for a locking device that incorporates a curved body while suppressing unnecessary rotational movement of the door.

[0011] The present invention is conceived in consideration of the aforementioned problems, and the door fixing device according to an embodiment of the present invention is such that a square rod (20) is installed on a door (10) so as to be reciprocable in the axial direction, and a spring (17) is installed on the square rod (20) so that an external elastic force is constantly applied to the square rod (20); an arc-shaped plate (23) and a restraining plate (25) are formed at the end portion of the square rod (20), and an arc-shaped curved surface is formed on the arc-shaped plate (23), and the restraining plate (25) is perpendicular to the arc-shaped plate (23), and the arc-shaped plate (23) is symmetrical with respect to the restraining plate (25) as the central axis; On the outer side of the door (10), a recess (33) is formed with a shape that matches the arc-shaped plate (23) and the restraining plate (25), and the door (10) is fixed by inserting the arc-shaped plate (23) and the restraining plate (25) of the square bar (20) into the recess (33).

[0012] Through the present invention, when using a fixing device for an entrance door such as a fire door, the door (10) can be freely rotated without the user's operation to unlock the door, and once the square rod (20) constituting the fixing device is coupled to the recessed portion (33), the restraining plate (25) prevents the square rod (20) from detaching from the recessed portion (33), thereby allowing the fixed state of the door (10) to be stably maintained.

[0013] In particular, stable fixation and smooth operation of the door leaf (10) are possible even on flat floors or wall ends without door frames, thereby ensuring ease of movement and allowing for free arrangement of the indoor space.

[0014] FIG. 1 is a plan view of various types of doors to which the present invention can be applied.

[0015] FIG. 2 is a representative cross-sectional view of the lower part of a door to which the present invention is applied.

[0016] FIG. 3 is a bottom perspective view of the excerpt of each bar of the present invention.

[0017] FIG. 4 is an excerpt perspective view of the square rod and the recessed part of the present invention.

[0018] FIG. 5 is an explanatory diagram of the present invention applied to a flat floor without a door frame.

[0019] FIG. 6 is an explanatory diagram of the state in which the present invention is applied to a floor with a step difference.

[0020] FIG. 7 is a cross-sectional view of the state in which the present invention is applied to a horizontal locking device.

[0021] FIG. 8 is a perspective view of an embodiment of the present invention to which a cross-shaped square bar is applied.

[0022] FIG. 9 is a perspective view of an embodiment of the present invention to which an H-shaped square bar is applied.

[0023] <Explanation of Symbols>

[0024] 10 : Door

[0025] 15 : Towing means

[0026] 17 : Spring

[0027] 20 : Each bar

[0028] 23 : Arch-shaped plate

[0029] 25 : Forced judgment

[0030] 33 : Recess

[0031] The detailed configuration of the present invention will be explained with reference to the attached drawings as follows.

[0032] First, FIG. 1 illustrates a plan view of various doors to which the present invention can be applied. As shown in the figure, the present invention can be applied to various types of doors, such as double doors or folding doors, as well as general hinged doors in which various hinges are installed at one end of the door leaf (10).

[0033] FIG. 2 is a cross-sectional view along line A-A' of FIG. 1, that is, a representative cross-sectional view of the lower part of the door (10) to which the present invention is applied. As shown, the present invention can be described as a door fixing device that fixes the door (10) to the floor, ceiling, or outer door frame, etc. through a means in the form of a bolt. FIG. 2 shows the lower part of the door (10) to which the present invention is mainly applied and the floor at the installation point of the door (10), but a fixing device of the same structure can also be installed on the upper part of the door (10) or the side part of the door (10) which is omitted in FIG. 2.

[0034] As shown in FIG. 2, a rectangular bar (20) with a flat cross-section is installed in the door (10) so as to be able to reciprocate in the axial direction, and a spring (17) is installed on the inner side of the door (10) of the bar (20) so that the elastic force from the outer side of the door (10) is constantly applied to the bar (20).

[0035] Here, 'angled bar' refers to a bar-shaped body with a polygonal cross-section or a form in which multiple plates are joined together.

[0036] That is, the square rod (20) of the present invention is a locking or fixing device that is embedded in the door leaf (10) of an entrance door, such as a fire door, and is installed to be able to protrude and be stored. A traction means (15) capable of artificially raising the square rod (20) is embedded in the door leaf (10) as in other fixing devices, and a spring (17) is installed to constantly protrude the square rod (20) to the outside of the door leaf (10), so that when the upward traction of the square rod (20) is released and the free state, the square rod (20) constantly protrudes to the outside of the door leaf (10).

[0037] However, the operation of retracting the square rod (20) into the inner side of the door (10) to release the fixed state of the door (10) can be performed by the user's operation. As shown in FIG. 2, a pulling means (15) connected to the upper part of the square rod (20) is configured to pull the square rod (20) into the inner side of the door (10) on the upper side of the drawing, so that the square rod (20) is moved into the inner side of the door (10) according to the user's operation.

[0038] In the embodiment illustrated in FIG. 2, a link connected to the side end of a diamond-shaped rotating body is applied as a traction means (15), and as the user rotates the rotating body, the link-type traction means (15) pulls the rod (20), causing the rod (20) to overcome the elastic force of the spring (17) and move into the door (10). However, in addition to this rotating body, various types of traction means (15), such as a lever, may also be applied.

[0039] As shown in FIG. 3, an arc-shaped plate (23) with an arc-shaped curved surface is formed at the lower end of the angle bar (20) so that the shape of the angle bar (20) gradually decreases as it goes downward, and the total width of the arc-shaped plate (23) in the plane is formed to match the width of the angle bar (20) in the plane, and a restraining plate (25) perpendicular to the arc-shaped plate (23) is formed vertically, and the arc-shaped plate (23) is symmetrical with respect to the restraining plate (25) as an axis, and the flat cross-section of the angle bar (20) at the point where the arc-shaped plate (23) and the restraining plate (25) are formed has a T-shape.

[0040] In addition, as shown in FIGS. 2, 4 and 7, an external structure of the door (10), such as the lower floor, upper ceiling, or side door frame of the door (10), has a recessed portion (33) formed with a shape that matches the cross-section of the arc plate (23) and the restraining plate (25), and when the square rod (20) reaches the recessed portion (33) during the rotation process of the door (10), the arc plate (23) and the restraining plate (25) of the square rod (20) are inserted into the recessed portion (33) by the elastic force of the spring (17), thereby fixing the door (10).

[0041] FIG. 5 illustrates the rotational movement and locking state of the door (10) through the square rod (20) and the recess (33) of the present invention, illustrating a structure in which a flat floor is formed around the door by omitting the floor door frame. As shown in the left and right ends of the figure, before the door (10) reaches the recess (33), the door (10) can move freely regardless of the direction of movement during rotation on the plane and subsequent horizontal movement on the figure. When the door (10) reaches the upper part of the recess (33), the square rod (20) protrudes downward, and the door (10) is finally fixed to the floor.

[0042] As can be seen through FIG. 5, the door (10) to which the present invention is applied can be stably fixed to the point where the recess (33) of the floor is formed, even if the floor door frame is omitted and a completely flat floor surface is formed in the periphery.

[0043] In particular, as shown in the central part of FIG. 5, after the square rod (20) is inserted into the recess (33), the curved surface of the arc plate (23) runs over the outer edge of the recess (33), and the phenomenon of the square rod (20) coming out of the recess (33) is suppressed through the combination of the restraining plate (25) and the recess (33), thereby preventing unnecessary movement of the door (10) and ensuring stable fixation.

[0044] In addition, in addition to the door frame omission structure as in FIG. 2 and FIG. 5, smooth operation and fixation are possible in a structure where a step or door frame is formed on the floor as in FIG. 6, or in a structure where a door frame is formed on the side of the door leaf (10) as in FIG. 7.

[0045] The square bar (20) of the present invention can be modified in various ways as shown in FIGS. 8 and FIGS. 9 while maintaining the basic configuration of a curved arc plate (23) and a restraining plate (25) perpendicular to the arc plate (23). FIGS. 8 is an embodiment in which the arc plate (23) and the restraining plate (25) are joined to form a cross-shaped cross section, and FIGS. 9 is an embodiment in which the arc plate (23) is joined to each end of the restraining plate (25) so that the overall shape of the square bar (20) forms an H shape.

[0046] In this way, through various shape changes of the square bar (20), various additional functions such as strength reinforcement and balance can be provided while maintaining the smooth operation and stable fixing function of the square bar (20) of the present invention.

[0047] The door fixing device according to an embodiment of the present invention can be used to fix doors such as fire doors.

Claims

1. In a door fixing device, A square bar (20) is installed on the door (10) so as to be reciprocating in the axial direction, and a spring (17) is installed on the square bar (20) so that an external elastic force is constantly applied to the square bar (20); An arc-shaped plate (23) and a restraining plate (25) are formed at the end portion of each bar (20), and an arc-shaped curved surface is formed on the arc-shaped plate (23), and the restraining plate (25) is perpendicular to the arc-shaped plate (23), and the arc-shaped plate (23) is symmetrical with respect to the restraining plate (25) as the central axis; A door fixing device characterized by having a recessed portion (33) formed on the outer side of the door (10) that matches the shape of the arc plate (23) and the restraining plate (25), and the door (10) being fixed by inserting the arc plate (23) and the restraining plate (25) of the square bar (20) into the recessed portion (33).

Images